Sound-reducing construction



June 23, 1931. I BALDUF I 1,811,250

SOUND REDUCING CONSTRUCTION Filed Feb. 15.1929

g I Z 3 a Pat'entedJune'Z3, 1 931 I UNITED STATES PATENT? OFFICE salmon. mm, or cmcaco, ILLINOIS, ASSIGNOR TO nm'rnn srarns oxrsuu Y comm, or cmcneo, rumors, A conronarron or rumors scrmn-nnnucme consume-non Application and Iebruary 15, 192a sum 110.840.1221.

This invention relates in general to a sound reducing construction for buildings and is more particularly described as a yielding suprt for mg the transference of sound tween adjacent parts of walls, floors and.

ceilmge One of the principal objects of the invention is in the provision of a permanently resilient metal support. for positively connect- 1!) ing structural parts to absorb and deaden sound and for reducing its transference from one part to another.

. Another object of the invention is in the provision of a yielding sound deadener which 7 dampens and localizes impacts upon a wall or floor with a snubbing action similar tothat of a net or a shock absorber, decreasing and distribu the vibratory effect upon the whole wall or con. Another object is in the rovision: of a structure having a surface which yields locally under impact to unevenly compress difierent portions thereof wherebysound waves from difierent localities instead of rebound ing in harmony are broken up, dispersed, opposed and effectively dampened. A still further object is in theprovision of a yielding metal supporting clip which always remains partially in compression so that a wall or floor supported thereby constitutes practically acontinuous load upon a flexible yielding sup ort.

- Anot er object is in the provision of a yielding metal supporting clip which requires no fibrous or other .pads to deaden sound or to cushion impacts. A. further object is in the provision of a yielding metal supporting clip which is adapted to-be secured to wood and concrete bases. 40 Other objects will appear hereinafter, the drawings illustrating a preferred embodiment of the invention as applied to a floor structure. V

In the drawings Fig. 1 is a view partly in section comprising a single metal floor supporting clip as applied to a wood supporting base; Fig. 2 is a view similar to Fig. 1 showing a supporting, clip applied to a concrete base; Fig. 3 is a perspective/of the floor clip for a wooden base; Fig. 4 is a perspective of an attachment for the clip of Fig. 3 and Fig. 5 is a perspective of a floor clip or a concrete base combining-the attachment of Fig. 4 with the clip ofFig. 3.

When sound waves engage a wall panel or floor,'a part of the sound energy is dissipated in the wall itself, but a part of the sound is transmitted and given out as audible sound in the next room. Various types of cushions, pads or blankets are inter osed between ad-, jacent walls to'dampen an absorb sound energy passing therethrough, but such pads lose their efficiency in impeding sound waves when they harden, become more compact and lose their resiliency.

The object of the present invention is to provide a permanently resilient member without the necessity of a pad or cushion for connecting it to either of the structural members between which it is placed. By providing a great number of such resilient members the action produced is similar to that of from an adjacent structure or base by means of a great number of resilient clips providing an exposed surface which is resilient and flexible and can be locally compressed ac In carrying out this nvention, the walls much like an ordinary spring bed or mattress which compresses in different grooves under different impacts. In a room thus finished, sound waves engages the outer floor or panel,

compressing unevenly the metal clips of various localities, thereby partially damping and dissipating the sound and'by reason'of the flexible resilient nature of the metallic clips preventing a direct impact between the floor or wall members connected thereby and preventing harmonic frequency of vibration between the floor or wall parts. 7

Refeiring more particularly to thedrawings, a single floor clip is shown connecting the supporting and surfacing parts of a floor. It should be understood that in a complete installation there are a great number of such clips so that the floor surface is in effect suspended by clips, and the clips are in partiaL ly compressed condition so that any particular locality may rise or fall relatively to the supporting base, depending upon the sound or impact received thereby. This same construction may be employed between adjacent walls, or panels may be thus supported by an interior wall construction.

As shown in Fig. 1, a supporting base or floor 6 is constructed of wood or light material resting upon floor beams 7. .Above the subfloor or base is a Wooden finished floor 8 connected to or mounted upon sleepers 9. These floor parts are spaced apart and the finished floor is in effect suspended by a plurality of resilient metal clips 10, each having a flat central saddle portion 11 adapted to be secured to the bottom of the sleeper 9 by nails 12 or other fastening devices and having parallel extremities 13 adapted to be secured to the supporting base below by fastening members 14 inserted through perforations 15. Between the attaching portions of each clip are opposite resilient loops 16 which extend upwardly and outwardly from the central attaching portion 11 'so that the adjacent sides of the spring loops are free from contact with the edges of the sleeper 9. The object of this angular extension of the loops is to prevent engagement with the sleepers. thereby reducing the spring action and tending to limit and obstruct the movement of the springs and to prevent rubbing or squeaking sounds. It will be noted that the legs 16a of the loops 16 make an acute angle with the clip end 13 so that said legs are free to move outwardly when downward movement is imparted to the saddle member 11, thus improving the sound absorbing properties of said clip.

In attaching a clip of this kind to a masonry or concrete base, additional means must be provided for quickly and effectively attaching the resilient clips. They cannot be nailed or quickly secured by other fastening means; so a grouting attachment 17 is provided for each end 13 of the clip. This attachment has its edges 18 bent inwardly to form integral lugs embracing one of the ends 13 of the attaching clip and may be provided with an opening 19 to register with the opening 15' at the end of the clip. It is also formed with a grouting opening 20. In applying a clip with these attachments to a concrete floor base 21, the floor clips are attached at spaced intervals to each stringer 9,'the stringers are then overturned with the attachment ends of the clips resting on top of the base 21 and each end of the clip with the attachment 17 thereon is secured in place by a small pad 22 or mass of hardening cementitous material which being placed upon the attachment 17 in a soft condition hardens thereabout, filling the grouting opening 20v and effectively securing the clip in place. If desired, a filling 23 of fibrous or other sound deadening material may be applied on top of the base 21 surrounding and between the clips 10, after h A similar construction may also be employed to connect adjacent parts of a wall or ceiling and when so used the sound impacts received by the .outer part or panel will be damped, distributed and absorbed as thus explained.

I claim: I

1. In a resilient impact absorber for adjacent structural parts, comprising a spring metal strip having a central saddle for attachment to one structural part, two end portionsin a different plane for connection to another structural part, curved, resilient, integral loops connecting the central and end portions, and an attachment having an lntegral lug for engaging each end part to increase the contact surface with one of said structural parts.

2. A cushioning sound dampener for spaced apart building structures, comprising a spring clip having a central saddle portion adapted to be secured to one of said structures, a pair of clip ends in a-plane different from but parallel to that of sad saddle member,.said ends being adapted to be secured to another of said structures, and integral spring loops extending outwardly from said saddle member and then inwardly toward said clip ends to dprovide a. yielding conne c tion between sai saddle member and clip ends.

- 3. In a resilient impact absorber for adjaportions.

4.. In a resilient impact absorber for adjacent structural parts,.a spring metal clip having a central saddle for attachment to one structural part, a plurality of end portions in a diilerent plane than that of said saddle for connection to another structural part, curved, resilient, integral loops connecting said saddle and end portions, said loops having legs extending toward said end portions at an acute angle thereto.

5. In a resilient impact absorber for adjacent structural parts, a spring metal clip having a central saddle for attachment to one structural part, a plurality of end portions in a different plane for connection to another structural part, curved, resilient, integral loops connecting said saddle and said end portions, an attachment removably secured to said end portions for increasing the contact surface with a structural part, and grout securing said attachment to a structural part.

6. A support for spaced apart structures,

comprising a spring clip having a centralsaddle portion adapted to be secured to one of said structures, a pair of clip. ends in a lane diflerent from but substantially paralel to that of said saddle member, said ends being adapted to be secured to another of said structures, and integral spring loops extending outwardly from said saddle member and then inwardly toward said clip ends to provide a connection between said saddle member and clip ends.

' BRUNO E. BALDUF. 

